I added keywordLuv and CommentLuv to this website

var commentLuv = {
    enabled: true,
    message: "CommentLuv enabled",
    link: "<!--commentLuvStart--><p class=\"commentLuv\"><abbr><em>{0}'s last blog post.. <a href=\"{1}\" target=\"_blank\">{2}</a></em></abbr></p>",
    //link: "<!--commentLuvStart--><br/><br/>{0}'s last blog post.. <a href=\"{1}\" target=\"_blank\">{2}</a>",
    init: function() {
        try {
            var websiteBox = BlogEngine.comments.websiteBox;

            if (websiteBox == null) return;

            // attach UI elements: checkbox and label
            commentLuv.appendElements();

            // keep ref for old addComment to be used later
            BlogEngine.addComment_Old = BlogEngine.addComment;

            // create a new addComment function that support commentLuv
            BlogEngine.addComment = function(preview) {
                // if no data was found or commentluv is disabled by the user exit, use addComment_Old and exit
                if (commentLuv.data == null || !commentLuv.enabled) {
                    BlogEngine.addComment_Old(preview);

                    return;
                };

                // check for html injection
                if (BlogEngine.comments.contentBox.value.indexOf("<!--commentLuvStart-->") > -1) return false;
               
                try {
                    // process data from commentLuv web service, service is called in websitebox.onchange and when posibly during init
                    var title = commentLuv.data.links[0].title;
                    var url = commentLuv.data.links[0].url;
                    var content = BlogEngine.comments.contentBox.value;
                    var author = commentLuv.getAuthor();

                    if (preview) {
                        // commentLuv ref for preview, used to revert back to comment without latest post
                        commentLuv.comments = BlogEngine.comments.contentBox.value;
                    };

                    var link = commentLuv.link;

                    // replace comment contents with content and latest post
                    BlogEngine.comments.contentBox.value = BlogEngine.comments.contentBox.value + link.replace("{0}", author).replace("{1}", url).replace("{2}", title);
                }
                catch (errObj) {
                    // unknown error, just use old addComment_Old and exit, not critical that commentluv works
                    BlogEngine.addComment_Old(preview);

                    return;
                };

                // prep work done add comment
                BlogEngine.addComment_Old(preview);

                if (preview) {
                    // the user requested a preview revert back to original comments
                    BlogEngine.comments.contentBox.value = commentLuv.comments;
                }
                else {
                    // clear
                    BlogEngine.comments.contentBox.value = "";
                    commentLuv.comments = "";
                };
            }; // BlogEngine.addComment end

            // add onchange handler to websitebox to capture url changes
            $addHandler(websiteBox, "change", commentLuv.website_onChange);

            // test if url was cached
            if (websiteBox.value.length == 0) return;

            // url was cached contact server to get latest post
            var url = "commentLuv.axd?website=" + websiteBox.value;

            BlogEngine.createCallback(url, function(response) {
                commentLuv.data = eval(response);

                commentLuv.updateLastPostMessage();
            });
        }
        catch (errObj) {
            alert("Unknown javascript error in CommentLuv:init, error: " + errObj.description);
        };
    },
    clearLastPostElement: function() {
        var lastPostElement = commentLuv.lastPostElement;

        if (lastPostElement == null) return;

        try {
            while (lastPostElement.firstChild != null) {
                lastPostElement.removeChild(lastPostElement.firstChild);
            };
        }
        catch (ignorErr) {
            // do nothing
        };
    },
    updateLastPostMessage: function() {
        try {
            var lastPostElement = commentLuv.lastPostElement;

            if (lastPostElement == null) return;

            commentLuv.clearLastPostElement();

            var title = commentLuv.data.links[0].title;
            var url = commentLuv.data.links[0].url;
            var author = commentLuv.getAuthor();

            lastPostElement.appendChild(document.createTextNode(author + "'s last blog post.. "));

            var link = document.createElement("a");

            lastPostElement.appendChild(link);

            link.target = "_blank";
            link.href = url;

            link.appendChild(document.createTextNode(title));
        }
        catch (errObj) {
            window.setTimeout(1000, commentLuv.updateLastPostMessage);

            alert("Unknown javascript error in CommentLuv:updateLastPostMessage. Error: " + errObj.description);
        };
    },
    appendElements: function() {
        // this function contains basic javascrit not going to document
        try {
            var cbNotify = $("cbNotify");

            if (cbNotify == null) {
                alert("cbNotify not found");

                return;
            };

            var parent = cbNotify.parentNode;

            var lastPostElement = commentLuv.lastPostElement = document.createElement("p");

            lastPostElement.id = "lastPostMessage";

            parent.insertBefore(lastPostElement, cbNotify);

            var enabledCheckbox = document.createElement("input");

            enabledCheckbox.type = "checkbox";
            parent.insertBefore(enabledCheckbox, cbNotify);

            $addHandler(enabledCheckbox, "change", function() {
                commentLuv.enabled = !commentLuv.enabled;
            });

            enabledCheckbox.checked = true;
            enabledCheckbox.id = "commentLuvCheckbox";
            enabledCheckbox.style.width = "auto";
            enabledCheckbox.style.display = "inline";

            // using a label element wouldn't display properly, moving on by using span
            var label = document.createElement("span");

            label.appendChild(document.createTextNode(commentLuv.message));

            parent.insertBefore(label, cbNotify);

            //label.htmlFor = enabledCheckbox.id;
            label.style.width = "auto";
            label.style.display = "inline";
            label.style.cssFloat = "none";

            enabledCheckbox.setAttribute("tabindex", 7);
            cbNotify.setAttribute("tabindex", 8);

            //width:auto;float:none;display:inline
            parent.insertBefore(document.createElement("br"), cbNotify);
            parent.insertBefore(document.createElement("br"), cbNotify);
        }
        catch (errObj) {
            alert("Unknow javascript error in commentLuv:appendElements. Error, " + errObj.description);
        };
    },
    getAuthor: function() {
        // if keyword is passed in with the author name parse out the keywords and return the author name
        var author = BlogEngine.comments.nameBox.value;
        var keywordStartIndex = author.indexOf("@");

        if (keywordStartIndex < 0)
            return author;

        return author = author.substring(0, keywordStartIndex)
    },
    addHandler: function(element, eventName, handler) {
        // basic add handler function
        if (element.attachEvent)
            element.attachEvent('on' + eventName, handler);
        else if (element.addEventListener)
            element.addEventListener(eventName, handler, false);
        else
            throw "browser not supported";
    },
    website_onChange: function() {
        try {
            // if the websitetextbox changes we call the server to get the latest post here
            if (!commentLuv.enabled) return;

            commentLuv.data = null;
            commentLuv.clearLastPostElement();

            if (BlogEngine.comments.websiteBox.value.length == 0) return;

            var url = "commentLuv.axd?website=" + BlogEngine.comments.websiteBox.value;

            BlogEngine.createCallback(url, function(response) {
                commentLuv.data = eval(response);

                commentLuv.updateLastPostMessage();
            });
        }
        catch (errObj) {
            alert("Unknown javascript error in CommentLuv:website_onChange. Error: " + errObj.description);
        };
    }
};

//create a global addHandler function
if (typeof ($addHandler) == "undefined")
    window.$addHandler = commentLuv.addHandler;

// hook into the app load event so that commentLuv can attach to the elements
BlogEngine.addLoadEvent(commentLuv.init);